PDCD1 and neoplasm: Additionally, the use of SB225002 (a CXCR2 inhibitor) in conjunction with Withaferin A (a natural anticancer agent that induces ferroptosis through lipid peroxidation in vivo) and α‐PD‐1 (an anti‐PD‐1 antibody) to block MDSC infiltration in tumor‐bearing mice led to increased survival rates [165].